Well packer



H. L. AULT WELL PACKER Feb. 18, 1958 Filed Aug. 12, 1954 6 Sheets-Sheet 1 0 mm m a w a. w w u m m 4 I ./,I//1 il' :IE; V I a d 8 3 am m a 7 ZZM 7 7 a w m w) m w w lllll III 0 ii A, 3 mm m iAA6 L. AMA? ATTORNEY I. L. AULT WELL PACKER Feb. 18, 1958 6 Sheets-Sheet 2 Filed Aug. 12. 1954 iSAAC L. AULT INVENTOR.

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25 ISAAC 1.. AULT INVENTORS BYJM MAM.)

ATTORNEY I a /03c Fdm 1%,, Filed Aug. 12, 1954 Feb w, 95$ v a. H. mm- 2,823,754

WELL mama Filed Aug. '12, 1954 Y 6 Sheets-Sheet 4 ISAAC L. AULT" INVENTOR.

A' rromwsr I. L. AULT WELL PACKER Feb. 18, 1958 6 Sheets-Sheet 5 Filed Aug. 12. 1954 INVENTOR.

A T TOP/VE Y ISAAC 1.. AUL r Ill/w FIG/5.

United .3

Patented Feb.

WELL PACKER Isaac L. Ault, Morgan City, La., assignor, by mesne assignments, to Socony Mobil Oil Company, Inc, a corporation of New York Application August 12, 1954, Serial No. 449,296

15 Claims. (Cl. 166-120) This invention relates to well packers and relates more particularly to a hook-wall packer for use in wells provided with casing which penetrates one or more subterranean productive formations.

In wells penetrating a plurality of subterranean productive formations, such as formations containing petroleum oil or gas, production is usually initiated from the lowermost economically productive formation. When production from the lowermost formation becomes economically unfeasible, it is necessary to exploit the next upper economically productive formation or in the alternative abandon the well. In most instances exploitation of this next upper formation requires recompletion of the well. Recompletion of a well orginally completed with a conventional type completion requires the use of a drilling rig. Use of a drilling rig to perform a recompletion is desirably avoided inasmuch as it is expensive and time consuming.

It is an object of this invention to provide a well packer. It is another object of this invention to provide a hook-wall packer for use within well casing. It is another object of this invention to provide a hook-wall packer which will not set prematurely. It is another object of this invention to provide a packet which will not create a point of reduced internal diameter Within the tubing string, thereby permitting unobstructed passage of wire line tools through the packer. It is another object of this invention to facilitate permanent type completion of wells provided with casing which penetrates one or more subterranean productive formations so that subsequent recompletions may be effected with wire line equipment instead of with drilling equipment. It is another object of this invention to provide, in combination with a packer through which wire line operations may be conducted, a tool for setting the packer in operating position.

within the casing of a well.

Figure 1 is a view in elevation of a well packer constructed in accordance with my invention.

Figure 2 is a view in elevation of a setting tool used to place the well packer of Figure 1 in operating position within a well bore.

Figure 3 is a fragmentary elevational view partially sectioned of the lower portion of the well packer of Figure 1.

Figure 4 is a horizontal view in section taken along the line 4-4 of Figure 3.

Figure 5 is a horizontal view in section taken along the line 55 of Figure 3.

Figure 6 is a fragmentary elevational view partially in section of the intermediate portion of the well packer of Figure 1.

Figure 7 is a fragmentary elevational view partially in section of the upper portion of the well packer of Figure 1.

Figure 8 is a horizontal sectional view taken along the line 8--8 of Figure 7.

Figure 9 is a horizontal sectional view taken along the line 9-9 of Figure 7.

Figure 10 is a horizontal sectional view taken along the line Iii-10 of Figure 7.

Figure 11 is a fragmentary elevational view partially in section of the lower portion of the setting tool of Figure 2.

Figure 12 is a fragmentary elevational view partially in section of the intermediate portion of the setting tool of Figure 2.

Figure 13 is a horizontal sectional view taken alon the line 1313 of Figure 12.

Figure 14 is a horizontal sectional view taken along the line 1414 of Figure 12.

Figure 15 is a fragmentary elevational view partially in section of the upper portion of the setting tool of Figure 2.

Shown in Figures 1 and 3*10 is a well packer constructed in accordance with my invention. Referring now to the drawings, the packer comprises a tubing connecting member 10, a mandrel 11, a plurality of lower slips 12, a lower, fixed cone 13, a rubber packer element 14, a plurality of upper slips 15, an upper movable cone 16, a movable collar 25 which is provided with a shoulder 25a, and a bell housing 26 comprising element 27 and element 23. The tubing connecting member, the mandrel, and the bell housing comprise the body of the packer. Passing through the body of the packer is a conduit or flow channel 29 which is formed with a substantially uniform diameter. The tubing connecting member It? is provided with a neck 30. The neck 36 is provided with threaded portion 40 adapted to be con nected to a collar, not shown, which in turn may be connected to well tubing. The tubing connecting member 1 is also provided with a conventional circular junk pusher 41 which extends entirely around the connecting member. The tubing connecting member 10 is provided with internal threads 42 and in its upper portion forms the outer wall of an annular cylinder 43. Positioned within cylinder 43 is a movable, free, annular piston 44., The piston 44 is provided on its lower end with an integral annular spacing skirt 45. A plurality of gasket chambers 55 are provided on the internal and external surfaces of the piston 44.

Mandrel 11 is provided with external threads 56, 57 and 58 and with gasket chambers 59 and tatl. Threads 56 are adapted to cooperate with threads 42 of the tubing connecting member 10. The mandrel M is also provided with annular shoulder 70 and with a plurality of fiuid ports 71 which lead to the cylinder 43.

Fixed cone 13, which is hereinafter described as the lower cone, surrounds mandrel 11 and is provided with internal threads 72 which are adapted to cooperate with threads 57. The surface of the cone extends downwardly and inwardly toward the axis of the mandrel. By Virtue of the cooperation of threads 57 and '72, the cone 1.3 is screw threaded onto the mandrel until the cone contacts shoulder 70 on the mandrel. Cone if; is also provided with a plurality of longitudinal keyways 73 cut into the outer surface of the cone. In the embodiment shown. keyways 73 are dovetail shaped, are four in number and. are spaced at intervals around the cone. Surrounding the sloping portion of the cone 13 are a plurality of slips 12 which are fixed to the cone by means of shear pins 74. The slips are constructed in the shape of a wedge and are provided with teeth '75 which are adapted to contact the internal surface of a casing of an oil Well. Also, slips 12 are each provided with a dovetail key '76 formed along the entire length of the face of the slip which contacts cone 13. Keys 76 are adapted to co operate with keyways 73 to maintain slips 12 in proper alignment on cone 13.

Surrounding the mandrel 11 is pack-off element 14, which is deformable to provide an annular seal within the casing of a well. Element14 may be formed of any suitable material, such as rubber.

Also surrounding mandrel 11 is upper cone 16 which is movable with respect to the mandrel and is provided with a plurality of longitudinal keyways 78' cut into the outer surface of the cone. The surface of the cone ex tends upwardly and inwardly towardthe axis ofthe mandrel. In the embodiment'shown' keyways 78"are dovetail shaped, four in number and are spaced at 90 intervals around the cone. A plurality of slips 15 are positioned around the cone 16 and secur'ed'to the cone by means of shear pins 79. Slips 15 are constructed'in' the shape of awedge'and are provided withteeth'i80 which are adapted to contact theinterna'l 'surface'ofa casing of an oil well; Slips 15"areeach further pro vided with a dovetail key 81 formed" along the entire length of the face of the'slip'which contacts cone "16.

Keys 81are adapted to cooperate with keyways -78"to maintain slips 15 in proper alignment on cone 16.

Also surrounding the mandrel 11 is movable collar 25."

Collar will'slide on mandrel 11 in a downward direction while the movement of the'collar 'in'anupward": direction is limited by contact with the lower 'end' of member 27.

Member 27 of bell housing 26 is "provided'with in? ternal threads 86 which are adapted to cooperate'with" threads 58 on mandrel 11. The'member' 27 is also pro'-" vided withexternal threads 87. The member 28'is pro vided with internal threads '88 adapted to cooperate with threads 87 on member '27 and is also provided withan' internal annular packing chamber 89. Chevron type packing 90fisdisposed within the chamber 89; The member 28 is also provided with gasket chamber'99' con taining O-ri'ng'gasket Member 27 is provided'with internal annular shoulder 101; Internal threads 102 are provided within the conduit 29 at the upper end of'the" member 28.

The member 28 is" also provided with a plurality of J-slot keyways 103 out into the external surface of the member. The'various portions of keyway 103 will be referred to by the following reference numerals: 103a,

103b, 1030, and 103d.

Shown in Figures 2 and 11-15 is a setting tool constructed in accordance with my invention.

115, a valve member 116, an 'outer sleeve 117, a'floating nut 118, and'a spring ,119. The val'vem'ember 116 is provided with] two gasket chambers 12$). The valve member 116 is shaped'internallyjtoform'va'lve chamber" Leading externally of the valve memberfromthe'valvechamber including conical shaped ball seat 131.

130 is orifice 132. The valve memberlldis'also pro vided with internal threads 133.

The sliding tube 115'comprises alo-ng "hollow tube containing a conduit 134 extending throughout its entire length. The tube 115"is provided "at'it's'lower end with external threads 135 adapted to cooperate-with threads 133 to maintain valve member ll6connected to the lower end of tube 115. The tube'is provided with a plurality of O-ring gasket chambers15t 151, 152,153,

154 and 155and with external annular shoulder 156. A plurality of pressure ports'lead' externallyfromthe' conduit 134 near the lowerend of'the conduit. As

shown, four ports 165 are'providedj although it willTbe understood that a greater or a lesser'number' may be adequate.

four ports 166 are provided,'although"it will"beunder-.

stood that a greater or a lesser number will be'adequate'."

Outer sleeve 117 comprises lower"mern'ber 167 and? upper member 168. The lower member167isprovided' at its upper end with internal threads169 and'the upper member 168-'isprovided at itslower end withexternal threads 170." Th e'threads 169 and l70' cooperatevwitli Referring" to'the figures the setting'toohcomprises a sliding tube The tube 115in the upper'portion"thereof is provided with a plurality of fluid' by-pass ports 166" leading externally from the conduit 134; A's"shown',

. threads169'and 170'cooperating'for this purpose. Spring each other to connect the upper and lower members of thesleeve'117. The lower member- 167 is provided with" a plurality of keys projecting from its internal surface. Four keys 180 are provided, although it will be understood that a greater or lesser number will be adequate. Upper member 168 is shaped to form internal shoulder 181. The uppermember 168 is shaped in its upper portion to formaneck portion .182 having an external diameter less than "the lower" portion of the upper membere The neck portion i 182 0f: :the upper member" keyways' 197 are provided "to cooperate with keys 180."

Surrounding the upper portion'of the fioatingnut is'spring IIQ-whichabuts' up'on'shoulder of the fioatingnut and shoulder'181 of the member 168of sleeve 117.

Assembly I of the setting tool of Figure 2 with the packer of Figure *1 may be conveniently accomplished by.

plac'i'ng'ithe 1owerrnember"167of the outer sleeve 117 overfthe 'bellhousingf26. Iriplacing the lower member 167 over'thebelhhousing 26, the'keys 180 enter the keyways "103'andbyturningthe outer sleeve 117"the keys are positioned'in'th'e running position within the keyways." In doing-this, the keys 180 enter the portions 103a of the keyways 103, move downwardly therethrough Inthe'poftions 103c,as shown; the 'keys 180 are 'in the runningposition. Thereafter, the. fioatingi nut118 is then"placed'within'the'lower'mem'ber 167 andturned such "that th e'threads'"185"are screwed onto the threads 102. Spring 119is 'place'd'ove'r the floating nut. Upper member168'is'then screwedonto lower member 167,

119*h1s'considerable resistance to compression and to overcome'this resistance in threading upper member 168 to lower"member'167, it will be necessaryvto employ a jigon otherapp'aratus' screwed tothe upper member 168. to"pro'vide sufficient torque and' thrust to connect the upper and lower "members .and' to compress the spring. This 'could'bedone; of icourse, by'usingthe drillingrig', buttheineonvenience ofsuch a..procedure would preclude it's *employrnentexcept i'n'an' emergency. There:

after, the 'slidi ngtube '11'5 rnaybe' positioned "by passing it into. the-tool 'through'theupper portion:'182of the upper 'member'168.

The sliding tube 115 may. not 'slide'downward beyond the point where shoulder-T156 on tube 115 contacts the upper end of floating nut 118. tube '115'is positioned'su'ch'thatthe ports 166 coincide longitudinally"with' the' ports 183. Gaskets in' chambers 120, 150, .151, 152, 153, 154 and 155, being'O-ring gaskets, serve to providesuflicienffriction to maintain the sliding'tube'115 'and valve member 116 in position with respect to the upper member 168 during the time ofiassembly. Upward movement of sliding tube 115 and valve member 116 is limited bycontact'of the upper end of the'tubewiththe'lower end of drill pipe screwed into threads 184 while running the'tool into'a well bore. At this position, ports166and 183 'arein longitudinal alignment. It is'n'ot essenti'althat this 'alignment'be'radial since annular cuts are provided in the outer surface of tube 115"'for'fluid'flowbetwe'en' the ports.

During operation; a tdobappropriate to the'purposes" associated with the function of the packer is attachedto' the tubing"connecting member"10," threads" 40 cooperating with threads on a suitable collar attached? thereto; For placing "a packer jusYaboVe the lowermost producing In assembly, the sliding Zone in the well, a tool comprising a'perforated section and means for closing ofl the tool in the event production is to be made from a higher formation may be attached to the collar connected to the tubing connecting member 10. Where the packer is employed above a duplicate packer, a similar tool with a slick joint on the bottom may be attached to the tubing connecting member 10.

The tool is lowered on the drill pipe down the casing to the desired location. The packer assembly is run into the hole wet, i. e., the drilling fluid within the hole passes upwardly through the orifice 132 and the conduit 134 to leave through the ports 166 and 183. Some of the fluid, of course, will be by-passed between the casing and the outer surface of the packer. After positioning the packer in proper location within the well bore, a quantity of diesel oil or other non-corrosive fluid is forced from the surface through the drill pipe to the packer. As a result of pumping of the diesel oil downwardly through the drill pipe, the fluid therein is displaced from the tool through the conduit 134. The rate of movement of the fluid is sufliciently great to force the sliding tube 115 downward to a position within the outer sleeve 117 where the shoulder 156 contacts the upper end of floating nut 118. As a result of this downward movement, the fluid port 166 is no longer in alignment with fluid port 183 and flow of fluid outwardly through these ports no longer occurs. Accordingly, the fluid passes out the conduit 134 through the orifice 132. Sufficient diesel oil is employed to fill the casing to at least the upper level of the packer. Any type of fluid may be employed in place of the diesel oil. However, the use of a substantially non-corrosive fluid is highly desirable to prevent premature failure of equipment.

Following spotting of the diesel oil within the casing, a metal ball is dropped from the surface of the ground through the drill pipe. The metal ball descends through the tubing and drops through the conduit 134 to come to rest upon the ball seat 131 in the valve member 116 closing the orifice 132. Following positioning of the ball, pressure is imposed upon the fluid within the drill pipe. Downward movement of the sliding tube 115 with the shoulder 156 resting against the upper end of floating nut 118 also results in alignment of pressure ports 165 of the running tool with fluid ports 71 in the lower portion of the packer. The imposition of pressure upon the fluid within the drill pipe and the packer imposes a pressure differential through ports 165 and 71 within the chamber 43 tending to force the hydraulic piston 44 upwardly. With the production of sufficient pressure differential in the chamber 43, hydraulic piston 44 will move upward causing movement of slips 12 upward along the cone 13, which results in the shearing of pins 74. The upward movement of the slips along the cone 13 also causes the slips to move outwardly to tightly contact the inner surfaces of the casing. While maintaining the pressure differential upon the fluid within the chamber 43, a greater portion of the weight of the drill pipe is permitted to rest upon the tool and a right torque is imposed upon the pipe. As a result thereof, the keys 180 move downwardly through the keyways 103 from the positions 1030 and upon reaching the portions 103b of the keyways, the keys snap to the portions 103a. With the imposition of greater weight, the keys move almost to the positions 103d within the keyways and simultaneously outer sleeve 117 is brought to bear upon the shoulder 25a of the movable collar 25. With the imposition of still greater weight, the keys move into the positions 103d and impose a force upon the collar 25 to simultaneously and coincidently move the slips 15 and the movable cone 16 downwardly. As a result of this movement, the rubber pack-off element 14 is compressed, forcing it to bulge outwardly and tightly contact the internal walls of the casing. With further pressure upon slips 15 and cone 16, the rubber pack-off element resists further movement of the cone with the result that the slips tend to move independently of the cone and shear pins 79 shear permitting the slips to move downwardly and outwardly into contact with the internal walls of the casing. Upper slips 15 being wedged into position, the packing element is immobilized within the casing. Additionally, weight upon the movable collar 25 by contact with the outer sleeve 117 tends to wedge both slips 15 and slips 12 outwardly. Accordingly, the packing element is tightly positioned within the casing.

The running tool may now be disconnected from the packer body. This is accomplished by lightening the weight of the drill string on the packer whereby the keys move upwardly through the keyways. 103a. A right torque is re-applied upon the drill string to maintain the keys 180 within the keyways 103a. The keys continue upwardly to come to rest within the upper portion of the keyways 197 in the floating nut 118.. With the imposition of greater right torque, the threads become unscrewed from threads 102 and the running tool may thus be removed from the packer body.

The above described procedure may be: repeated to set as many well packers as desired within a well bore. In order to set a packer above a previously set packer, a collar is attached to the neck 30 of the tubing connecting member 10 of the packer to be set, a shut-01f tool is attached thereto, a section of tubing is attached to the shut-off tool, and a slick joint or connecting member is attached to the tubing. The slick joint is adapted to fit within the bell housing 26 of the previously set packer with the lower end of the slick joint contacting the shoulder 101 in the previously set packer. Contact with the shoulder 101, however, is not essential since it may be desired for various reasons to leave a space between the lower end of the slick joint and the shoulder 101 of the previously set packer.

Where production is to be effected from a producing zone between two packers, sufficient room is provided within the conduit 29 to receive wire line tools. Stated otherwise, the internal tubing diameter need not be reduced at any point by reason of the presence of the packers. A tubing gun may be lowered at the end of a wire line within the tubing between the packers and perforation of the tubing effected with resultant production from the producing zone below one or more packers.

It will thus be seen that there has been provided a tool which may be used to efficiently and eifectively pack off one or more producing zones in an oil well. The tool has through its entire length a conduit of sutficient diameter to permit the operation therethrough of wire line tools. While the invention has been described particularly in connection with its use within a well bore penetrating a plurality of formations, it will be realized by those skilled in the art that various other applications may be made. Generally stated, the packer may be employed for any purpose where non-retrievable packers have heretofore been found to be of use.

Having thus described the invention, it will be understood that such description has been. given by way of illustration and example and not by way of limitation, reference for the latter purpose being had to the ap pended claims.

I claim:

1. A hook-wall packer comprising structure having a flow channel extending centrally thereof, a first cone longitudinally slidable on said structure, a plurality of slips positioned on said first cone, shearable means for securing said slips to said first cone, a second cone secured in a fixed position on said structure below said first cone, a plurality of slips positioned on said second cone, deformable packing means positioned around said structure between and engageable with said first cone and said second cone and adapted to support said first cone, means positioned above said first cone slidsgsrasma able longitudinally on a said :structure adapted :to engage said :first cone and,.slips :and force said cone and slips downwardly-to expand said flexible paekingelementand set said slips, and hydraulically operable means I on said structure :below-said second cone adapted to set said slips on said second cone.

2. hookl-wall packer comprising structure having a flow channel zextending centrally'thereof, a -first cone longitudinally =slidable on said structure, a plurality of slips positioned "on said first cone, shearable means socuring said slips to saidfirst'cone, asecond cone secured ina'fixed position on said structure 'below said first "cone, -a -plurality of slips positioned on said second cone, deformable packing "means positioned around said structure between and engageabie with said'first cone "and said 1 second cone "and i'adapted'to support said first cone, means positioned above said first cone slidable longitudinally on said structure adapted to engage saidfirst cone and slips and force said cone and slips downwardly to expand sai'd'fiexiblepacking element and set said slips, means secured to said structure below said secondcone providing an annular cylinder around said structure, means providing ports interconnecting said .ilow channel and said annular cylinder, and an annular piston slidably positioned within said annular cylinder, said piston being engageable with the lower ends of said slips on saidsecond ,cone to set said slips in response to fluid pressure within said flow channel.

'3. ,A hook wall packer comprisingstructure having .a flow channel extendingtcentrally thereof, an upper cone positionedonsaid structure, said upper cone being long'itudinally slidable with respect to said structure, a plurality-of slips positioned on said upper cone, securing means connected between said slips and said upperlcone, said securing means being adaptedito shear underapredetermined load to release said-slips to slide along said upper cone, deformablepacking means positioned :around said structure below said upperconc and adapted to support said upper cone, the upper end of said packing means being engageable .with the lower end of said upper cone, slidable .means positioned on said structure above said uppercone andengageable with said upper cone and slips toqexpand said deformable packing means and set said slips, a lower cone secured in a fixed position on said structure below said deformable packing means, said lower cone being engageable at its upper end vwith ,thelower. end of saidpacking means, a'plurality ofslips positioned onsaid lower cone, and hydraulically operable means on said structure below said lower cone adapted .to setsaid slips on said lower cone in response to fluid pressure within said flow'channel.

4. .A hook-wall packer comprisingstructure having a flow channel extending centrally thereof, an upper cone positioned onsaid structure, said upper cone being longitudinally .slidable with respect to said structure, a plurality of slips positioned on said upper cone, securing means connected between said slips and said upper'cone, said securing means being adaptedto shear under apredetermined load to release saidslips to slide along said upper cone, deformable packing means positioned around structure below said upper cone and adapted to support said upper cone, the upper end of said packing means being engageable Wlthzthfi lower end of said upper cone, slidable means positioned on said structure above said upper cone and engageable with said upper cone and slips to expand said deformable packing means and set said slips, a lower cone securedin a fixed position on said structure below said adeformablelpacking means, said lower cone being engageable at its upper end with the lower end of said packing means, a plurality of slips positioned on said lower cone, means secured to said structure below said lower cone providing an annular cylinder around said structure, "means providing ports interconnecting said fiow "channel and said annular cyl-= inder, and-=an annularipiston positioned within said annular cylinder, said piston being =engage'able with the lower ends" oft-said slips on said lower cone "to set said slips in response 'to 'flui'd pressure "Within said ilow channel.

5. A hook wall packercornprising in combination a tubular body having-a "flow "channelextending centrally thereof, an upper none-positioned on said*tubular body and adapted toslide longitudinally 'with "respect 'to said body, a plurality'of wedge shaped slips slidably positioned on said upper "cone, ashe'ar pin securing each of said 'slipsto'said upper-cone, me'ansfor maintaining said slips in alignment on said upper "cone, a lower cone secured ina fixed *positionon said'tubular body and spaced'apart downwardly fromsaid upper'eone, "a plurality of wedgea's'hape'd slips slidably positioned on said lower cone, a; shear "pinisecuringeachof :said slips to saidlower cone, 'meansffor maintainingsai'd'slips in alignment on said lower cone, deformable packing means'around said tubular bodybetween saidupper'cone and said lower cone and adapted to support said upper cone, collar means slidable on said tubular body above said upper "cone, said collar means being engageable withsaidupper coneand slips and adapted to urge said cone and slips downwardly to expand said packing means and set'said slips -on said upper cone, and hydraulically operable means on said body below said lower'cone for-setting said slips on said lower cone responsive to 'fiuid pressure withinsaid flow channel.

6. A.hookwall.packer comprising in combination a tubular bodyl'having a flow channel extending centrally thereof, an upper cone positioned on said tubular body and adapted to slide longitudinally with respect to said body, a plurality of wedge-shaped slips 'slidablyg'positioned on said Iuppercone, :asheanpin securing eachof said slips to said uppercone, means for maintaining said slips in alignment on said upper cone, --a.llower .cone secured in a fixed position onsaid tubular body andrspaced apart downwardlyzfrom said uppercone, a plurality of wedgeshaped slips slidably ,positioned on said lower cone, a shear pin securing each of said slips-tosaid lower cone, means for anaintiningsaid slips in alignment on .said lower cone, -deformable .packingmeans around said tubular body between said uppercone and said llower cone and adapted tosupport said upper cone,' collar=means slidable on said tubular body above said upper :cone, said collar means being-engageable with said upper-coneand slipsand adapted to urge saidtcone-and slipsdownwardly to expand said packingmeans and set said slips onsaid upper cone,-means secured to said tubular body below said lower cone providing an annular cylinder around said tubular bedy, means providing ports interconnecting said flow channel and'said annular cylinder, and "an-annular piston slidably positioned within said annular cylinder,

said piston being enga'geable (with the .lower ends of said slipson said-lower conettoset said slips in response to fluid pressure within saidrflow channel.

7. A hook-wall packer comprising in combination a tubular body "having :a -fiow I channel :extending centrally thereof and including ;a =mandrel having a bell housing secured to the upperend thereof and a tubing connecting member secured :tothe .lower end thereof, a plurality of slots.formedtin'the outer surface of said bell housing at the upperend thereof, .an'upper cone positioned on said mandrel and adapted to slidelongitudinally withvrespeet to said mandrel, the surfaceof said upper cone extending upwardly andiinwardly toward theaxis of said mandrelga plurality 20f wedge-shaped :slipsslidably mounted on the surface of said upper cone, means onthe insidesurface of 'said'slips in engagement :withmeans on :the surface .of said upper cone 'for holding 'said slipsin alignment-'onsaid upper cone,' shear-pins'securing said-slips in a fixed position on said upper cone and adapted to shear'undera predetermined load '=to free said slips to slide along the surface of said upper cone, deformable packing means positioned on said mandrel below said upper cone and adapted to support said upper cone, an annular collar positioned on said mandrel above said upper cone and adapted to slide longitudinally with respect to said mandrel, the upper end of said, annular collar being engageable with the lower end of said bell housing and the lower end of said collar being engageable with the upper ends of said upper cone and said slips mounted on said upper cone, a lower cone threadedly engaged at a fixed position on said mandrel, a shoulder formed on said mandrel and adapted to engage said lower cone at the upper end thereof, the surface of said lower cone extending downwardly and inwardly toward the axis of said mandrel, the upper end of said lower cone being engageable with the lower end of said deformable packing means, a plurality of wedge-shaped slips slidably mounted on the surface of said lower cone, means on the inside surface of said slips in engagement with means on the surface of said lower cone for holding said slips in alignment on said lower cone, shear pins securing said slips in a fixed position on said lower cone and adapted to shear under a predetermined load to free said slips to slide along the surface of said lower cone, means providing an annular cylinder in the upper portion of said tubing connecting member, means providing a plurality of ports through said mandrel interconnecting said flow channel and the lower end of said annular cylinder, an annular piston slidably positioned within said annular cylinder and engageable at its upper end with the lower ends of said slips on said lower cone, and means adapted to maintain the lower end of said annular piston at a position within said annular cylinder above the point of entry of said ports interconnecting said flow channel and the lower portion of said annular cylinder.

8. In a tool for running a well packer into a well the combination of an outer sleeve having a neck portion of reduced diameter at the upper end thereof, means providing a plurality of ports in said sleeve at the lower end of said neck portion, a sliding tube movably positioned within said sleeve and having a flow channel extending centrally thereof, means providing a plurality of ports in the upper portion of said sliding tube adapted to cooperate with said ports in said sleeve, means providing a plurality of ports in the lower portion of said sliding tube, a floating nut positioned within said sleeve around said sliding tube, said floating nut being adapted to engage the upper end of a well packer to secure said packet to said tool during the setting of said packer in a well, and means securing said floating nut within said outer sleeve in movable relationship with said outer sleeve. 7

9. In a tool for running a well packer into a well the combination of an outer sleeve having a neck portion of reduced diameter at the upper end thereof, means providing a, plurality of ports in said sleeve at the lower end of said neck portion, a sliding tube movably positioned within said sleeve and having a flow channel extending centrally thereof, means providing a plurality of ports in the upper portion of said sliding tube adapted to cooperate with said ports in said sleeve, means providing a plurality of ports in the lower portion of said sliding tube, valve means secured to the lower end of said sliding tube adapted to close said flow channel, a floating nut positioned within said outer sleeve around said sliding tube, said floating nut being adapted to engage the upper end of a well packer to secure said packer to said tool during the setting of said packer in a well, and means securing said floating nut within said outer sleeve in movable relationship with said sleeve.

10. In a tool for running a well packer into a well the combination of an outer sleeve having a neck portion of reduced diameter at the upper end thereof, means providing a plurality of radial ports in said outer sleeve at the lower end of said neck portion, an annular shoulder formed on the inside surface of said sleeve below said neck portion, a sliding tube movably positioned withinsaid sleeve and having a flow channel extending centrally thereof, means providing a plurality of upper radial ports in said sliding tube adapted to cooperate with said ports in said outer sleeve, an annular shoulder formed around the outside surface of said sliding tube below said upper radial ports in said tube, means providing a plurality of radial ports in said sliding tube near the lower end thereof, a valve seat secured to the lower end of said sliding tube adapted to receive ball means to prevent the flow of fluid from the lower end of said sliding tube, a floating nut disposed within said outer sleeve around said sliding tube, the upper end of said nut being engageable with said annular shoulder on the outside surface of said sliding tube, an annular shoulder formed around the outside surface of said nut, a helical spring positioned around said nut, the upper end of said helical spring being engageable with said annular shoulder formed on the inside surface of said outer sleeve and the lower end of said helical spring being engageable with said annular shoulder formed on the outside surface of said nut, screw threads formed on the outside surface of the lower portion of said nut adapted to engage the upper end of a well packer, and means for the engagement of said outer sleeve with said floating nut to permit the rotation of said floating nut coincident with rotation of said outer sleeve.

11. In a tool for running a well packer into a well the combination of an outer sleeve having a neck portion of reduced diameter at the upper end thereof, means providing a plurality of radial ports in said outer sleeve at the lower end of said neck portion, an annular shoulder formed on the inside surface of said sleeve below said neck portion, a sliding tube movably positioned within said sleeve and having a flow channel extending centrally thereof, means providing a plurality of upper radial ports in said sliding tube adapted to cooperate with said ports in said outer sleeve, an annular shoulder formed around the outside surface of said sliding tube below said upper radial ports in said tube, means providing a plurality of radial ports in said sliding tube near the lower end thereof, a valve seat secured to the lower end of said sliding tube adapted to receive ball means to prevent the fiow of fluid from the lower end of said sliding tube, a floating nut disposed within said outer sleeve around said sliding tube, the upper end of said nut being engageable with said annular shoulder on the outside surface of said sliding tube, an annular shoulder formed around the outsidesurface of said. nut, a helical spring positioned around said nut, the upper end of said helical spring being engageable with said annular shoulder formed on the inside surface of said outer sleeve and the lower end of said helical spring being engageable with said annular shoulder formed on the outside surface of said nut, screw threads formed on the outside surface of the lower portion of said out adapted to engage the upper end of a well packer, a plurality of longitudinal keyways formed on the outside surface of said floating nut above said screw threads, and a plurality of longitudinal keys formed on the inside surface of said outer tube, said keys being adapted to engage said keyways in said floating nut to permit rotation of said floating nut coincident with rotation of said outer sleeve.

12. In combination a hook-wall packer comprising structure provided with a central flow channel, an upper cone positioned in longitudinally slidable relation on said structure, a lower cone secured in a fixed position on said structure, a plurality of slips movably secured on said upper and said lower cones, deformable packing means positioned around said structure between said upper cone and said lower cone and adapted to support said upper cone, slidable means on said structure above said upper cone adapted to engage said upper cone and slips, hydraulically operable means secured to said assays! structure below-said lower-cone adapted to set said slips 13. In combination a hook-wall -packer comprising structure-provided with a central flow channel, an upper cone positioned in longitudinally slidable relationon said structure,"a lower cone secured in-a fixed-position on said structure, a plurality of slips movably secured on said upper and saidlower cones, shearable means securing said slips to said cones, deformable packing means positioned around said structure-between said upper cone and said lower cone andadapted to-support said upper cone, longitudinally slidably collar means positioned on said structure above said upper cone adapted to engage the upper ends of said upper cone and slips, means secured to said structure providing an annular cylinder around saidstructure below said lower cone, an annular piston slidably positioned within said cylinder and' engageable with the lower ends of said slips on said lower cone, means providing a plurality of ports interconnecting said central flow channel and said annular cylinder, means adapted -to engage said structure above said upper cone, and means movably secured to said last mentioned means adapted to be moved hydraulically downward into said central-flow channel to complete another flow channel to said ports.

14. In combination a hook-wall packer comprising a tubular body-having a flow channel extendingcentrally thereof, 'antupper cone secured in longitudinally slidable relation onsaid body, a plurality of slips slidably mounted onsaid. upper cone, shearable means securing said slips to-said upper cone, means on said body above said upper coneengageable with the upper ends of said upper cone and said slips, a lower cone secured in a fixedposition on said body, a plurality of slips slidably mounted on said lower cone, shearable means securing said slips to said lower cone, deformable packing means-positioned around said bodyubetween said upper cone and'said lower cone-and adapted to'support said upper cone, means providing an annular cylinder around said-body below said lower cone, an annular piston slidably positioned within said cylinder and engageablewiththe lower ends of said slips on said lower cone, means'providing ports interconnecting said flow channel and the lower portion of said cylinder, and a tool for positioning said packer in a well bore, said tool having'means adapted to threadedlyengage the inside surface of saidtubularbody above said upper cone, and means associated with said last mentioned means adaptedto be moved hydraulically downward into-saidtubular body'to form an exclusive ,fluid flow-path from-above said packer to said portsfor applyinghydraulicpressuretothe lower end of said piston to'move said slips on said lower cone into engagement with the inside surface of the casing of a well.

15. In combination a hook-wall packer 'comprisingza tubular body provided with a flow channel extendingtcentrally thereof, screw threads formed on the innertsurfaceof said tubularbody at the upper end thereof, a plurality of slots formed in the outer surface of said. tubular body at the upper end thereof, an upper cone slidable longitudinally on said body with slips slidably mounted thereon, shearable means securing said slipsto said upper cone, slidable means on said body above said upper cone engageable with the upper ends of said upper cone and said slips, a lower cone secured in a fixed position on said body with slips slidably mounted thereon, deformable packing means positioned around said body between said upper cone and said lower cone and adapted to supportsaid upper cone'and' provide packing between said tubular body and the casing of a well, means secured to'said tubular body providing an annular cylinder around said body below said lower cone, an annular piston slidably positioned within said cylinder andengageable with the lower ends of said slips on said lower cone, means providing ports interconnecting said flow'channel and' the-lower portion of said annular cylinder, and'a tool secured to said packer for positioning said packer in a Well bore, said tool comprising an outer sleeve having a neck portion of reduced diameter at'the upper'en'd thereof, a plurality of ports in said'sleeve at the lower end'of said neck portion, a sliding tube positioned within said sleeve andadapted to'be moved hydraulically down-- ward into said flow channel in said tubular body, a plurality :of ports in the upper portion of said sliding tube adapted to cooperate with said ports in said sleeve, a plurality of ports in the lower portion of said slidingtube adapted to cooperate with said ports in said tubularbody interconnecting said flow channel and the lower portion of said a cylinder, a floating nut positioned within said outer sleeve around said sliding tube, screw threads formed on the outer surface of said floating nut adapted toengage said screw threads formed on the inner surfaceof the upper portion of said tubular body, a plurality of keyways-formed in the outer surface of said nut, and a plu rality of keysformed on the inner surface of said outer sleeve, said keys being adapted to engage said keyways in .said floating nut and said slots in said tubular body.

'References Cited in the filetof'this patent UNITED STATES PATENTS 1,"804,'6l9 Humason May 12, 1931 2,227,731 'Lynes Jan. 7, 1941 2,328,840 OLeary Sept. 7, 1943 2,435,899 Page "Feb. 10, 1948 2,467,801 Baker .Apr. '19, 1949 2,589,506 Morrisett Mar. -18, 1952 2,695,064 Ragan et al Nov. 23,,1954 

